PUMA Women's Mobium Elite Speed Running Shoe 100% Textile/Synthetic Imported MOBIUM BAND 3D - A finely-tuned elasticized band with 3 degrees of stretch, that runs from the outsole through the Windlass Chassis onto its top surface and then again hooks back outside the tooling. It works dynamically just like your foots tendons: the more force that is applied to it, the more spring it returns; EXPANSION PODS - provide targeted flexibility, and are designed to align closely with the foots bone structure so that it flexes at exactly the same place and in the same way that your foot does; Rubber sole Four-way stretch upper Supreme Ride EVA sockliner with forefoot flex grooves Expansion Pods located on the forefoot outsole Elasticized Mobium Band runs through the outsole in a figure 8 pattern EverRide+ outsole with enhanced cushioning and durability for a smoother toe-off EverTrack high abrasion resistant rubber featured in high wear areas of outsole